Journal of Electroceramics

, Volume 18, Issue 3–4, pp 283–288 | Cite as

Structure and microwave dielectric properties of Sm(2−x)/3LixTiO3

Article

Abstract

The structural evolution, and microwave dielectric properties of \( {\text{Sm}}_{{{{\left( {2 - x} \right)}} \mathord{\left/ {\vphantom {{{\left( {2 - x} \right)}} 3}} \right. \kern-\nulldelimiterspace} 3}} {\text{Li}}_{x} {\text{TiO}}_{3} \) ceramics (x = 0.0 ≤ x ≤ 0.5) were investigated in this work. X-ray diffraction (XRD) results show that samples with x > 0.3 exhibit a single perovskite phase. Impurity phases of Sm2Ti2O7 and TiO2 appear and their amount increases with the decrease of x when x ≤ 0.3. TEM observation indicates that the A-site is ordered in x = 0.5, but not in x = 0.3). The dielectric constant decreases with the increase of x for 0.1 ≤ x ≤ 0.4 and then increases with further increase in x up to x = 0.5. The Q×f value decreases with the decrease of x due to the increased occurrence of Sm2T2O7 secondary phase, defects and twinning boundaries. The temperature coefficient of resonant frequency is negative and its absolute value decreases greatly with the decrease of x value.

Keywords

A-site deficient perovskite Order-disorder Microwave dielectric properties 

References

  1. 1.
    Y. Harada, T. Ishigaki, H. Kawai, J. Kuwano, Solid State Ion. 108, 407 (1998)CrossRefGoogle Scholar
  2. 2.
    Y. Inaguma, T. Katsumata, M. Itoh, Y. Morii, J. Solid State Chem. 166, 67 (2002)CrossRefGoogle Scholar
  3. 3.
    M.L. Sanjuan, M.A. Laguna, Phys. Rev. B64, 174305 (2001)Google Scholar
  4. 4.
    M.A. Laguna, M.L. Sanjuan, A. Varez, J. Sanz, Phys. Rev. B66, 054301 (2002)Google Scholar
  5. 5.
    J.J. Bian, K. Yan, G.X. Song, J Electroceramics (in press). http://www.sps-spitech.com/springer/jwf/EEC/20070312113844a
  6. 6.
    J.J. Bian, K. Yan, G.X. Song, AMEC-5, Bankok, Thiland 2006Google Scholar
  7. 7.
    I.M. Reaney, E. Colla, N. Setter, Jpn. J. Appl. Phys. 33, 3984 (1994)CrossRefGoogle Scholar
  8. 8.
    P.M. Woodward, Acta Cryst. B53, 44 (1997)Google Scholar
  9. 9.
    A.M. Glazer, Acta Cryst. B28, 3384 (1972)Google Scholar
  10. 10.
    J.A. Alonso, J. Ibarra, M.A. Paris, J. Sanz, J. Santamaria, C. Leon, A. Varez, M.T. Fernandez, Mater. Res. Soc. Symp. Proc. 575, 337 (2000)Google Scholar
  11. 11.
    C.J. Howard, B.J. Kennedy, P.M. Woodward, Acta Cryst. B59, 463 (2003)Google Scholar
  12. 12.
    Y.C. Wu, H.Y. Lu, D.E. McCauley, M.S.H. Chu, J. Am. Ceram. Soc. 89(9), 2702–2709 (2006)Google Scholar
  13. 13.
    R.D. Richtmyer, J. Appl. Phys. 10, 391 (1939)CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  1. 1.Department of Inorganic MaterialsShanghai UniversityShanghaiChina
  2. 2.Department of Materials Science & EngineeringBoise State UniversityBoiseUSA

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